<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <!-- 
        字符串模板   可以在字符串中插入变量

     -->
     <script>
         var a=10;
         var b="hello world"
         var c=`hello ${a} world`
         console.log(c)   //hello 10 world
    </script>
</body>
</html>